Rail Wars! Nihon Kokuyū Tetsudō Kōantai (RAIL WARS! -日本國有鉄道公安隊-, lit. Rail Wars! Japanese National Railways Security Force) is a Japanese light novel series written by Takumi Toyoda with illustrations by Vania 600. As of February 2014, eight volumes have been published by Sohgeisha under their Sohgeisha Clear Bunko imprint. A manga adaptation titled Rail Wars! Nihon Kokuyū Tetsudō Kōantai The Revolver began serialization in Mag Garden's Blade Online in 2012. An anime adaptation has been announced and is scheduled to air from July 2014.

The series takes place in an alternate version of Japan where the nationalized railway system was never privatized. Naoto Takayama is an ordinary high school student who aspires to a comfortable life working at Japanese National Railways. He ends up working as a security force trainee, where he unwillingly has to deal with his strange colleagues as well as RJ, a group of extremists who are fighting to privatize the railway.